Working through my first playthrough on Hard. Have to say as an IE vet, Hard reminds me a lot of mid-late stage BG2/ToB and late IWD - just enough mobs to make things difficult but not quite so tough as I can't re-evaluate what I'm doing wrong, usually it's because I'm favoring direct damage over affliction debuffs.
While yes, there are some abilities that tend to be overpowered (full disclosure: looking at you ectoplasmic echo - which I'm loving running with my guncipher and GM), most of the game mechanics are beautifully balanced.
I just got to act 3 last night, and will graduate up to Paths of the Damned for a bit. I am, however, also thinking of saving a PotD run for my next playthrough, probably with a druid or a rogue.
Just want to take this opportunity to say I am LOVING this game.